/*
 * Copyright 2019 Immutables Authors and Contributors
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *  http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package org.immutables.criteria.geode;

import org.apache.geode.cache.Region;
import org.apache.geode.cache.RegionService;
import org.apache.geode.cache.client.ClientCache;
import org.apache.geode.cache.query.QueryService;

/**
 * Strategy to select a {@link QueryService} for a {@link Region}.
 *
 * <p>Query service can be associated with a {@link org.apache.geode.cache.client.Pool} or
 * query only local state (see {@link ClientCache#getLocalQueryService()}.
 *
 * @see RegionService#getQueryService()
 * @see ClientCache#getLocalQueryService()
 * @see ClientCache#getQueryService(String)
 */
public interface QueryServiceResolver {

  /**
   * Find {@linkplain QueryService} for a region.
   */
  QueryService resolve(Region<?, ?> region);

  static QueryServiceResolver defaultResolver() {
    return DefaultQueryServiceResolver.INSTANCE;
  }

}
